Patent Application
20170171835
Embodiments herein relate to a network node, a user equipment and methods therein. In particular they may relate to deciding whether the UE is located indoors or outdoors.
Wireless devices or terminals for communication are also known as e.g. User Equipments (UE), mobile terminals, wireless terminals and/or mobile stations. Wireless devices are enabled to communicate wirelessly in a cellular communications network or wireless communication system, sometimes also referred to as a cellular radio system or cellular networks. The communication may be performed e.g. between two wireless devices, between a wireless device and a regular telephone and/or between a wireless device and a server, such as server providing video streaming service, via a Radio Access Network (RAN) and possibly one or more core networks, comprised within the cellular communications network.
Wireless devices may further be referred to as mobile telephones, cellular telephones, computers, or surf plates with wireless capability, just to mention some further examples. The wireless devices in the present context may be, for example, portable, pocket-storable, hand-held, computer-comprised, or vehicle-mounted mobile devices, enabled to communicate voice and/or data, via the RAN, with another entity, such as another wireless device or a server.
A cellular communications network covers a geographical area which is divided into cell areas, wherein each cell area is served by a base station, e.g. a Radio Base Station (RBS), which sometimes may be referred to as e.g. eNodeB (eNB), NodeB, B node, Base Transceiver Station (BTS), or AP (Access Point), depending on the technology and terminology used. The base stations may be of different classes such as e.g. macro eNodeB, home eNodeB or pico base station, based on transmission power and thereby also cell size. A cell is the geographical area where radio coverage is provided by the base station at a base station site. One base station, situated on the base station site, may serve one or several cells. Further, each base station may support one or several communication technologies. The base stations communicate over the air interface operating on radio frequencies with the wireless devices within range of the base stations. The base stations and wireless devices involved in communication may also be referred to as transmitter-receiver pairs, where the respective transmitter and receiver in a pair may refer to a base station or a wireless device, depending on the direction of the communication. Two wireless devices involved in D2D communication may also be referred to as a transmitter-receiver pair. In the context of this disclosure, the expression Downlink (DL) is used for the transmission path from the base station to a wireless device. The expression Uplink (UL) is used for the transmission path in the opposite direction i.e. from the wireless device to the base station.
Universal Mobile Telecommunications System (UMTS) is a third generation mobile communication system, which evolved from the GSM, and is intended to provide improved mobile communication services based on Wideband Code Division Multiple Access (WCDMA) technology. UMTS Terrestrial Radio Access Network (UTRAN) is essentially a radio access network using wideband code division multiple access for communication with terminals. The 3GPP has undertaken to evolve further the UTRAN and GSM based radio access network technologies.
In 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE), base stations, which may be referred to as eNodeBs or even eNBs, may be directly connected to one or more core networks.
3GPP LTE radio access standard has been written in order to support high bitrates and low latency both for uplink and downlink traffic. All data transmission is in LTE is controlled by the radio base station.
Positioning of terminals can take advantage of network support in communication networks, and communication links in a communication network may be used to share positioning information. In 3GPP LTE is supported by the network architecture illustrated by
Furthermore, there are also extensions to LPP discussed outside 3GPP in Open Mobile Alliance (OMA) that can be conveyed in a dedicated LPP container. The extension protocol is denoted LPPe in the OMA LPP Extensions Specification.
Moreover, there are also interactions between the location server and the eNodeB via the LPPa protocol specified in 3GPP LTE TS 36.455, to share both common and UE specific information between an eNodeB and E-SMLC. LPPa is the LPP, part between eNodeB and E-SMLC. To some extent, the information shared via LPPa can be requested by the eNodeB from the UE via the Radio Resource Control (RRC) protocol.
The following positioning techniques are considered in LTE (3GPP 36.305):
However even if the positioning of UEs is a valuable information for the network performance, this information may be ambiguous or uncertain.
It is therefore an object of embodiments herein to improve the performance in a communications network.
According to a first aspect of embodiments herein, the object is achieved by a method performed by a network node. The network node and a user equipment, UE, operate in a communications network.
The network node configures the UE to report information indicating whether the UE is located indoors or outdoors.
After receiving a message from the UE which message comprises the information indicating whether the UE is located indoors or outdoors, the network node decides whether the UE is located indoors or outdoors based on the received indication. The deciding enables the network node to provide network support in the communications network based on whether the UE is located indoors or outdoors.
According to a second aspect of embodiments herein, the object is achieved by a method performed by a User Equipment, UE. The UE and a network node operate in a communications network. The UE is configured by the network node to report information indicating whether the UE is located indoors or outdoors, After establishing an indication whether the UE is located indoors or outdoors, the UE sends a message to the network node which message comprises information about the established indication whether the UE is located indoors outdoors.
According to a third aspect of embodiments herein, the object is achieved by a method performed by a network node. The network node and a user equipment. UE, are arranged to operate in a communications network. The network node is configured to:
According to a fourth aspect of embodiments herein, the object is achieved by a User Equipment, UE, which UE and a network node are arranged to operate in a communications network, the UE is configured to:
Embodiments herein provide a way of signalling indoor/outdoor information from the UE to the network node which enables the network node to provide network support in the communications network based on a decision whether the UE is located indoors or outdoors.
As part of developing embodiments herein, a problem will first be identified and shortly discussed.
In cellular networks of today, it is an increasing interest to determine if a UE/user is located indoors or outdoors. This is interesting from many aspects, for example radio network algorithms, network tuning, and positioning. For example, in a specific situation where it is desired to locate a user equipment, and the location is ambiguous or uncertain, it may be of significant use to know if the user is actually indoors or outdoors. It may even help determine true location the location of the user.
Currently there is not any existing technology for indoor/outdoor classification, but there are a number of proposed methods in a UE to detect that the UE is indoors.
Pengfei Zhou, Yuanqing Zheng, Zhenjiang Li, Mo Li, and Guobin Shen, “IODetector: A Generic Service for Indoor Outdoor Detection”, SenSys'12, Nov. 6-9, 2012, Toronto, ON, Canada, describes examples of such indoor/outdoor classification.
However, there is currently no arranged way of signalling indoor/outdoor information from the UE to the communications network. There is further no signalling that enables the network to assist the UE in indoor/outdoor classification.
Embodiments herein are based on a capability of a UE to establishing an indication whether the UE is located indoors or outdoors by e.g. classify whether it is indoors or outdoors, or make a measurement of a quantity that is different indoors or outdoors.
A plurality of network nodes operates in the communications network 100 whereof one, a network node 110 is depicted in
A UE 120 operates in the wireless communications network 100. The UE 120 is served by the network node 110.
The UE 120 may e.g. be a wireless device, a mobile wireless terminal or a wireless terminal, a mobile phone, a computer such as e.g. a laptop, a Personal Digital Assistants (PDAs) or a tablet computer, sometimes referred to as a surf plate, with wireless capability, or any other radio network units capable to communicate over a radio link in a wireless communications network, Please note that the term UE used in this document also covers other wireless devices such as Machine to machine (M2M) devices.
The UE 120 may be indoors e.g. in a building 130, as in the scenario depicted in
It may also be referred to in other words that the UE 120 is indoors or not indoors, or as an alternative the UE 120 is outdoors or not outdoors. In some examples of the invention indoor and outdoor is further divided into subgroups, e.g.
An indicator may also be between fully indoor and fully outdoor, like an indoor probability value, where the indicator reflects the probability or likelihood that the UE (120) is indoors (or alternatively outdoors).
As mentioned above, embodiments herein are based on a capability of The UE 120 to establishing an indication whether the UE 120 is located indoors or outdoors which may be performed e.g. by classifying whether it is indoors or outdoors, or making a measurement of a quantity that is different indoors or outdoors.
It may be for example based on an ambient light analysis, but embodiments herein as such do not preclude other means to detect or assess whether the UE 120 is indoors or outdoors.
Example of embodiments of a method performed by the network node 110 will now be described with reference to
The method may comprise the following actions, which actions may be taken in any suitable order. As mentioned above, in some embodiments the network node is represented by a distributed network node by means of cloud computing enabling ubiquitous network access to a shared pool of configurable computing resources. In these embodiments the actions below may be performed by different nodes.
Action 301
In some embodiments, the network node 110 receives a message from the UE 120, which message comprises information that the UE 120 is capable of establishing an indication whether it is located indoors or outdoors. This may be sent after requesting it by the network node 110 or be sent by the UE 120 without an explicit request. Thus the network node 110 may receive indoor/outdoor classification capability information from the UE 120.
Action 302
The network node 110 configures the UE 120 to report information indicating whether the UE 120 is located indoors or outdoors. This may be performed when the network node 110 wants to classify the UE 120 being indoor or outdoor by use of e.g. a positioning protocol such as LPP (LTE Positioning Protocol), see Section 5.3.1, 5.3.2. Alternatively, the network node 110 configures the UE 120 via RRC to report information indicating whether the UE 120 is located indoors or outdoors.
The network node 110 may provide assistance data to the UE 120 to be used for establishing the indication whether the UE 120 is located indoors or outdoors. The assistance data may be a specific signal or beacon signal such as a beacon signal transmitting a specific identity belonging to a set of identifiers that are associated to a specific indoor environment. Assistance data may also be data characteristics for indoor and outdoor that enable the UE 120 to make a more accurate decision whether the UE 120 is located indoor or outdoor.
The network node 110 may also provide report triggering information, to instruct the UE 120 when to report. Such triggering information may be on demand, which means that the UE 120 is requested to report directly, or within a time window, periodically which means that the UE 120 will report with a certain periodicity until for example a number of reports have been completed, or a criterion is met, or event-driven which means that the report is triggered when a criterion is met. Typical such criterions may e.g. comprise
Action 303
When the UE 120 has established an indicating whether the UE 120 is located indoors or outdoors e.g. by means of measurements associated to an indoor/outdoor classification, it sends e.g. by signalling, the indication to the network node 110.
A signalling possibility is provided by embodiments herein to enable reporting and/or signalling of the indication such as e.g. a measurement of the detection. This may for example be an indoor/outdoor bit informing the network node 110 that the UE 120 has classified itself as being indoor or outdoor. Furthermore, the reporting may possibly be extended to e.g. a 8 bit value resolving a UE-decided probability of being indoor or outdoor, or a more elaborated signalling/reporting where the UE 120 sends up a larger amount of information, making a decision basis for the communications network 100 to estimate if the UE 120 is indoors or outdoors. For example ambient light frequency distributions, temperature statistics, wind velocity statistics, etc. In general, the indication such as e.g. the measurements and assessments associated to indoor/outdoor classification may be referred to as Indoor-Outdoor Information, IOI.
The network node 110 thus receives a message from the UE 120. The message comprises the information indicating whether the UE 120 is located indoors or outdoors. The network node 110 e.g. receives information associated the indoor/outdoor classification from the UE 120.
Action 304
The network node 110 decides whether the UE 120 is located indoors or outdoors based on the received indication. The deciding, also referred to as the indoor/outdoor decision, enables the network node 110 to provide network support in the communications network 100 based on whether the UE 120 is located indoors or outdoors. The received indication may be information, such as e.g. the classification that the UE 120 is indoors or outdoors, or a measurement based on which the network node 110 can decide whether the UE 120 is indoors or outdoors. If it is an information, such as e.g. the classification that the UE 120 is outdoors, the network node 110 may decide according to the received indication that it is outdoors, but it may also decide opposite to the indication that the UE 120 is indoors, if it has additional knowledge pointing to the opposite of the indication, and vice versa. This may for example occur if the UE 120 wrongly reports that it is outdoor due to that e.g. the ambient light indoor has outdoor characteristics. Then the UE 120 reports that it is outdoors, but the network node 110 has also received radio measurement reports from the UE 120 that definitely indicates that the UE 120 is indoors.
Action 305
The network node 110 may provide network support in the communications network 100, based on the received information indicating whether the UE 120 is located indoors or outdoors.
In some embodiments, the network support comprises any one or more out of: adapting radio network algorithms related to the communications network 100, tuning the communications network 100, and providing to the communications network 100, positioning of the UE 120 based on whether the UE 120 is located indoors or outdoors. In some embodiments the network node 110 provides information about the positioning of the UE 120 to other UEs in the communications network 100 and vice versa information about other UEs positions is provided by the network node 110 to the UE 120, e.g. if it is in a narrow room indoors in a room in a building. The network support may also be an emergency support that is rarely triggered. For example, in case of a fire in a building the network such as the network node 110 may provide information to the fire rescue that persons, i.e. users of UEs being reported as indoor may still be in the building.
Example of embodiments of a method performed by the UE 120 will now be described with reference to
The method may comprise the following actions, which action nay be taken in any suitable order.
Action 401
In some embodiments, the UE 120 sends a message to the network node 110, which message comprises information that the UE 120 is capable of establishing an indication whether it is located indoors or outdoors. This may be sent upon request by the network node 110.
Action 402
The UE 120 is configured by the network node 110 to report information indicating whether the UE 120 is located indoors or outdoors. See related Action 302 above. The network node 110 may further provide assistance data to the UE 120; to support the establishing of an indication whether the UE 120 is located indoors or outdoors indoor.
Action 403
The UE 120 establishes an indication whether the UE 120 is located indoors or outdoors. E.g. the UE makes measurements associated to an indoor/outdoor classification.
There may be different mechanisms in the UE 120 that can support indoor outdoor establishing. Some examples comprise:
It may be for example based on an ambient light analysis, but embodiments herein as such do not preclude other means to detect or assess whether the UE 120 is indoors or outdoors. This may e.g. be performed by means of a method described in Pengfei Zhou, Yuanqing Zheng, Zhenjiang Li, Mo Li, and Guobin Shen, “IODetector: A Generic Service for Indoor Outdoor Detection”, SenSys'12, Nov. 6-9, 2012, Toronto, ON, Canada, as mentioned above.
In some embodiments the UE 120 may establish different classes within the respective class indoor and class outdoor. In some examples of the indoor and outdoor is further divided into subgroups, e.g.
Action 404
The UE 120 then sends a message to the network node 110 which message comprises information about the established indication whether the UE 120 is located indoors outdoors. See more about this in the related Action 303 above.
The reported indication such as e.g. the indoor/outdoor classification information can be used by the network node 110 to enhance positioning by reducing the uncertainty to only indoor areas. For example, due to positioning inaccuracy there may be several possible true positions in some cases. By an additional indoor/outdoor classification some (hopefully all except one) of the possible positions may be ruled out since they are known to be outdoor.
Action 404
The UE 120 may then receive network support in the communications network 100, based on the reported indication whether the UE 120 is located indoors or outdoors.
As mentioned above, for example in case of a fire in a building the network such as the network node 110 may provide information to the fire rescue that persons, i.e. users of UEs being reported as indoor may still be in the building.
Also, in case of emergency call positioning it is desirable to map the positioning to an address to be sent to a public safety dispatcher coordinating Enhanced 911 (E911) efforts. Such an address is commonly referred to as a dispatchable address. E911 is a system that links emergency callers with the appropriate public resources. This mapping to the dispatchable address may be refined by using indoor/outdoor information.
This will be further described below.
The embodiments above will now be described more in detail and exemplified. This text below is applicable to any suitable embodiment described above.
This below relates to network support, e.g. as mentioned in Action 305 and 404 above.
In case the network node 110 is a base station, the base station may consider the indoor/outdoor decision such as e.g. the indoor/outdoor classification in the radio resource management to improve the user experience of the user of the UE 120 and/or other users of UEs. For example, indoor users such as the user of the UE 120 and/or users of other UEs may be assumed to be subject to specific mobility behavior, or may be requested by the network node 110 to start monitoring indoor cells on a dedicated frequency carrier.
The indoor/outdoor decision such as e.g. the indoor/outdoor classification may also be used to separate performance monitoring data into indoor and outdoor classes, making the data more informative to the operator and also provides better input to network tuning, network extension discussions and feature assessments.
Signaling Embodiments
As mentioned above, the UE 120 may be requested to provide information about its capabilities to establish whether it is indoors or outdoors, e.g. via LPP, LPPe, RRC, etc.
For example, in LPP a message content may be modified to accommodate an indoor/outdoor classification capability IndoorClassificationInfo, see underlined below, according to:
IndoorClassificationInfo
OPTIONAL,
-- Need ON
Wherein:
ASN1 means Abstract Syntax Notation One. It is standard and notation that describes rules and structures for representing, encoding, transmitting, and decoding data in telecommunications and computer networking.
OTDOA-ReferenceCellInfo means Observed Time Difference Of Arrival—Reference Cell Information
OTDOA-NeighbourCellInfoList means OTDOA—Neighbour Cell Information List.
OTDOA-Error provides OTDOA error reason.
Similarly, the UE 120 may receive assistance data to support indoor classification from the network node 110 such as an eNB via RRC, or such as from an E-SLMC via LPPe.
There are also different means to convey the established indication such as the IOI to the network node 110 in different embodiments:
Embodiments herein may have an information field for Indoor Outdoor reporting or classification, for example similar the below example for atmospheric pressure in OMA-LPPe Extensions Specification.
OMA-LPPe-AtmosphericPressure
The OMA-LPPe-AtmosphericPressure represents the atmospheric pressure measured by the target.
Wherein:
UTCTime means Coordinated Universal Time.
EllipsoidPointWithAltitudeAndUncertaintyEllipsoid is description of a geographic shape as defined in 3GPP TS 23.032.
The OMA-LPPe-AtmosphericPressure is part of the LPP Extension specification and is given as an example LPPe information element. The information element OMA-LPPe-AmbientLight below, is given as an example of indoor outdoor indication information for an embodiment using LPPe for transmission of indoor outdoor indication information. However, this is just one example embodiment, where other embodiments may use LPP or RRC.
One such example using an ambient light metric as indoor outdoor indication information may look as the below information element:
The OMA-LPPe-Ambient Light represents the light spectral metric measured by the target, i.e. the UE 120.
Wherein
location EllipsoidPointWithAltitudeAndUncertaintyEllipsoid is description of a geographic shape as defined in 3GPP TS 23.032.
Further examples of establishing indoor outdoor indication information may be based on air humidity, temperature, wind speed, background noise, distance to surrounding objects, etc.
The information field would contain an indoor outdoor tag, in the simplest form one bit telling if UE 120 thinks it is indoors or outdoors. The information may also have the possibility to report indoor/outdoor with a probability low high. Furthermore, one option is to have a field where UE 120 may transmit Statistics to enable the network node 110 to make the decision on if the UE 120 is indoors or outdoors, in this case the indication comprises the statistics.
The indoor outdoor indication information may be requested on demand, or reported in an event-driven fashion such as only reported when it is subject to changes, like transiting from outdoor to indoor and vice versa. The indoor outdoor indication information may in some examples be reported periodically. In such examples the indoor outdoor indication information preferably comprises statistics of amount of indoor location and the amount of outdoor location during a measurement period, e.g. during the time since last report.
Utilization of IOI in the Network Node 110 e.g. for Network Support
The IOI may be utilized in the network node 110 in several ways, for example in some embodiments:
Embodiments herein provides a method in a wireless network such as the communications network 100, to e.g. receive an estimate of if the UE 120 is indoors or outdoors, or measurements to enable network estimation of if the UE is indoors or outdoors.
The communications network 100 such as the network node 110 may use the information to separate data in indoor and outdoor classes, configure UEs differently based on indoor and outdoor classes, and reduce positioning uncertainty based on indoor and outdoor assessments, etc.
To perform the method actions described above in relation to
The network node 110 is configured to, e.g. by means of an configuring module 610 configured to, configure the UE 120 to report information indicating whether the UE 120 is located indoors or outdoors.
The network node 110 is further configured to, e.g. by means of a receiving module 620 configured to, receive a message from the UE 120. Which message comprises the information indicating whether the UE 120 is located indoors or outdoors.
The network node 110 is further configured to, e.g. by means of a deciding module 630 configured to, decide whether the UE 120 is located indoors or outdoors based on the received indication. The deciding enables the network node 110 to provide network support in the communications network 100 based on whether the UE 120 is located indoors or outdoors.
The network node 110 is further configured to, e.g. by means of an providing module 640 configured to, provide network support in the communications network 100, based on the received information indicating whether the UE 120 is located indoors or outdoors.
In some embodiments, the network support comprises any one or more out of: adapting radio network algorithms related to the communications network 100, tuning the communications network 100, and providing to the communications network 100, positioning of the UE based on whether the UE 120 is located indoors or outdoors.
The network node 110 may further be configured to, e.g. by means of the receiving module 620 configured to, receive a message from the UE 120, which message comprises information that the UE 120 is capable of establishing an indication whether it is located indoors or outdoors.
To perform the method actions described above in relation to
The UE 120 is configured to, e.g. by means of a configuring module 710 configured to, be configured by the network node 110 to report information indicating whether the UE is located indoors or outdoors.
The UE 120 is further configured to, e.g. by means of an establishing module 720 configured to, establish an indication whether the UE 120 is located indoors or outdoors.
The UE 120 is further configured to, e.g. by means of a sending module 730 configured to, send a message to the network node 110 which message comprises information about the established indication whether the UE 120 is located indoors outdoors.
The UE 120 may further be configured to, e.g. by means of the sending module 730 configured to, send a message to the network node 110. The message comprises information that the UE 120 is capable of establishing an indication whether it is located indoors or outdoors.
The UE 120 may further configured to, e.g. by means of a receiving module 740 configured to, receive network support in the communications network 100, based on the reported indication whether the UE 120 is located indoors or outdoors.
The embodiments herein comprising the actions in the methods above may be implemented through one or more processors, such as a processor 650 in the network node 110 depicted in
The network node 110 and/or the UE 120 may further comprise a memory comprising one or more memory units, such as the memory 660 comprised in the network node 110 depicted in
The respective memory 660 and memory 760 are arranged to be used to store e.g. data, configurations, IOI, UE capabilities and applications to perform the methods herein when being executed in the network node 110 and/or the UE 120.
Those skilled in the art will also appreciate that the modules in the network node 110 and/or the UE 120, described above may refer to a combination of analog and digital circuits, and/or one or more processors configured with software and/or firmware, e.g. stored in the respective memory 660 and memory 760, that when executed by the one or more processors such as the respective processor 650 and processor 750 as described above. One or more of these processors, as well as the other digital hardware, may be included in a single Application-Specific Integrated Circuitry (ASIC), or several processors and various digital hardware may be distributed among several separate components, whether individually packaged or assembled into a system-on-a-chip (SoC).
When using the word “comprise” or “comprising” it shall be interpreted as non-limiting, i.e. meaning “consist at least of”.
The embodiments herein are not limited to the above described preferred embodiments. Various alternatives, modifications and equivalents may be used. Therefore, the above embodiments should not be taken as limiting the scope of the invention, which is defined by the appending claims.
Abbreviation Explanation
3GPP 3rd Generation Partnership Project
BS Base Station, in LTE eNB
eNB/eNodeB Evolved Node B
E-SMLC Evolved-Serving Mobile Location Centre
GMLC Gateway Mobile Location Centre
GNSS Global Navigation Satellite System
IE Information Elements
IOI Indoor-Outdoor Information
LCS Location Services
LCS-AP LCS Application Protocol
LED Light-Emitting Diode
LPP LTE Positioning Protocol
LPPa LPP, part between eNodeB and E-SMLC
LPPe Extension protocol to LPP
MDT Minimize Drive Test
MME Mobility Management Entity
OMA Open Mobile Alliance
OTDOA Observed Time Difference of Arrival
RRC Radio Resource Control
TDOA Time Difference of Arrival
UE User Equipment
UTDOA Uplink TDOA
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/SE2015/051087 | 10/14/2015 | WO | 00 |
| Number | Date | Country | |
|---|---|---|---|
| 62202933 | Aug 2015 | US |
